Application Of Teflon Tape Thread Sealant; Oxygen System Limits - Piper PA-44-180 SEMINOLE Maintenance Manual

2. Preswaged swageloc fittings are fabricated and installed as follows:
A. Assemble the nut and ferrules finger tight on the pre-swaging tool and insert the tube until it firmly
bottoms on the shoulder in the tool. The pre-swaging tool can be attained from Crawford Fitting
Company. refer to List of Consumable Materials in Chapter 91.
B. Tighten the nut on the fitting just enough that the tube within the fitting will not turn by hand.
C. With a wrench tighten the nut as follows:
(1). On tubing with diameters over 3/16 inch, tighten 11/4 turns.
(2). On tubing with 1/16, 1/8, or 3/16 inch diameter tighten 3/4 of a turn.
D. Unscrew the nut to release the ferrule tube assembly from the tool.
E. The assembly is installed on the fitting as follows:
(1). Slide tube in fitting until it bottoms, turn nut to finger tight position, and tighten one quarter turn with
wrench.
(2). Snug slightly with wrench.

APPLICATION OF TEFLON TAPE THREAD SEALANT.

All male pipe (tapered) threads of the oxygen system should be sealed with 3M No. 48 teflon tape. Teflon tape
should not be used on straight threads. Do not use any other lubricants in place of the tenon or on any other
threads.
1. Wrap tape on the threads, starting with those farthest from the opening, in the direction of the thread spiral.
Circle the threads, making sure that each side of the tape has a slight overlap.
2. Wrap the tape such that is does not extend beyond the last thread on the fitting at the opening. The tape
should then be pulled till is separates. Do not cut the tape, it will not stick properly.
PARTS
Regulator
Pressure Gauge
High Pressure Lines
Low Pressure Lines
Outlets
External Recharge Valve
Masks
1
NOTES: . On condition replace the rubber components in the assembly or replace assembly.
2
. If the screen in front of valve is dirty, replace valve. Valve replacement is recommended for
every 5 years.
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
CHART 3502. OXYGEN SYSTEM LIMITS
INSPECTION
300 Flight Hrs.
300 Flight Hrs.
300 Flight Hrs.
300 Flight Hrs.
300 Flight Hrs.
Each Use
Each Use
2J19
OVERHAUL
5 Years
ReplaceonCondition
Replace on Condition
Replace on Condition
Every 5 Years'
Every 5 Years2
Replace as Necessary
3 5 - 11 - 0 4
Page 35-11
Revised: May 15, 1989